Valve



FIG. 1 is a perspective view of a valve according to our new ornamental design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines shown in the figures are included for the purpose of illustrating portions of the valve and form no part of the claimed design. 

CLAIM The ornamental design for a valve, as shown. 